# Atmel EDBG-based Tools Protocols
Housekeeping Commands

#### Firmware Upgrade

Invokes upgrade mode. No further communication is required.

Table 59. Firmware upgrade command format

Field | Size | Description
--- | --- | ---
CMD_HOUSEKEEPING_FW_UPGRADE | 1 byte | Command ID
Version (0x00) | 1 byte | Command version
Upgrade key | 4 bytes | Key for enabling upgrade mode

Responses:

- OK

- FAILED

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